Preparation and structural characterization of stable Cs2O closed-cage structures Academic Article uri icon


  • Films of cesium oxides with a Cs to O ratio of about 2: 1 (in addition to Ag) and approximately monolayer dimensions are widely utilized, for example, on the surface of S-1 photocathodes,[1] negative electron affinity (NEA) devices,[2] and also discharge lamps, television cameras, and lasers. These films reduce the work function of the electrode and thereby increase the electron emission current and long-wavelength response of these devices.[1, 2] Particular emphasis has been placed on the study of Cs1+ xO for applications in catalytic converters [3, 4] and optical fibers. The structure of these surface layers deposited on photoemissive and NEA devices has proved difficult to resolve and interpret, partly due to the thinness of the film and the pronounced instability of Cs2O. Furthermore, as these films are highly reactive and thin, they are damaged or destroyed by short exposure …

publication date

  • January 1, 2005